Project Euler
============
Here mainly use C++ to solve those problems in Project Euler.
In the future, I will switch to Java.
It will keep on updating when I have some time on weekend.
Please note that these with _1.C, _2.C, _3.C correspond to the version 1, version 2 and version 3.
Version 1 basically is built on brute-force way, its only elegance is to waste computer time.
Version 2 and Version 3 use some algorithms. All those algorithms and proofs can be found online.
Please also note that those without "End: data" are those un-finished.
To be continue ...